Add storage global object

[bsneed]

• Added storage global object.
• Added getValue(key), setValue(key, value), and removeValue(key) to said object.
• Added tests.
• Special cases for NSNull since UserDefaults doesn't support it, but its expected from the JS side.
• Added internal conversion function to deal with UserDefaults use of class clusters.

[codecov]

Codecov Report

❌ Patch coverage is 91.05691% with 11 lines in your changes missing coverage. Please review.
✅ Project coverage is 39.73%. Comparing base (3a14ea3) to head (2bb39e6).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
Sources/AnalyticsLive/LivePlugins/StorageJS.swift	90.75%	11 Missing ⚠️

❌ Your project status has failed because the head coverage (39.73%) is below the target coverage (50.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #32      +/-   ##
==========================================
+ Coverage   37.60%   39.73%   +2.12%     
==========================================
  Files          38       39       +1     
  Lines        3303     2746     -557     
==========================================
- Hits         1242     1091     -151     
+ Misses       2061     1655     -406     

Files with missing lines	Coverage Δ
...ources/AnalyticsLive/LivePlugins/LivePlugins.swift	96.40% <100.00%> (+1.77%)	⬆️
Sources/AnalyticsLive/LivePlugins/StorageJS.swift	90.75% <90.75%> (ø)

... and 37 files with indirect coverage changes

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